1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d300ce3f1e353f32907b75bf727117f45afbce279d2c8cf3bff3806120760b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec17b634-3cc0-42a4-8715-5a0a55722992.json and https://artists.proofprofile.net/proofs/artist/ec17b634-3cc0-42a4-8715-5a0a55722992.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5590e21cd241d992344fd615f9085fb247a55eefa2548dd1fd78ad90409b400c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c81690fadeeac894c5fdd8b4428c4fc6fea78625b3b62fdca4df5c7818a976. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54293dae451f6738be4312547e649f72e4a650421ebcd1f3301241a5d8a94cdb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4682bab598e7d3273f30ee508d37d037243226ce65122220535924badd6a42. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c22a24400bf6d2cc60b08a6288050ccc8c0d778cd955cc906aeaf8629605aa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc86861036a2fb5c719993677e80968b90c7068d417a6a58fc360f5ce55f6850. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecab2188c16e6b30b377d1ef42024da2b6dc9311d8f6ee5bfb521d3a7777a0b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32001750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a559940bced75074ff583a32bfb279b042da7e00b7a6dce088524b2716ee17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8491671359aa3f34ce189e36ed1b037d99abbefed35f2d647397c81fdc1fb8d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402fcf21f78edf9bfcf5dc3cc481d4266939313a3839fc54486533f84991094. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32100674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e2a2966c0eb16d67525b0f0fcaacc4a2016e55d0cf0a6e0d24b5cb8e1b409. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32500645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae8ce5aa00d206a1a2df8619143a178ee8344666282395a484b4d9fa4fccf9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f5d1e186f6105cd9e244882f183be2053d009e7c1d145dc0c62eb3dcb5ec4a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32404631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aa818b24555ba20a8c911f55fefcbb93ff1371a9d490eb5e68abc829e9244c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32302948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b8441ae7f30425bbf14288ed51eb22682f73a22d68e1bdfe4d16e8b1f3eaa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32302949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e735d07363fb70b56c8822177b2b801b0c4b7c5018512a2061ffce21b649a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32302210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612f9d16147cc230c191bf5a34a3bfdde0af0c0e2850965a94cfb964b9f0d785. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32302654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1a8c2170d06c7b09af7a206e502cc19d43ff71ee15c14b6143a3b9c6c5edb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32302950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7bb56e8a57a0e26f5c6be330966e1fc600151f7c140d1fe52bbb6cff990e19. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32302951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d0376fc731c72d6e852fdc4fdae863e0256e52376dcc1115b62602a0738f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32204653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaebc526156a2f9bbf84d4773a3636b18a10e3f39f0680a7cf56e5f4e8220b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32204654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd862918aa469ca3b938cd13fa9d0b54a5da753c6ae97d86020ffe001fd76a62. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32204655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ef6fa742db283d644b4d4aa88ac490932d7f8f18640c121000c4fd05d94057. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32102372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9247828e3343c99b1c036371ddb68d138ff46650927560b9557d43ce67bb8a20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732153831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ca6af6e65cf1df9be56ff2ee966c5d987e5060ff76018189455f8c95d273c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE32000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a4c52b25f197e45fa399d9b126fa389a09eb1e1211e45269d06ee29ade040. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE31901877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb87ddf284e29113e0bf92bf65efbfc42fd4dfe9ec57db3fdbd34f3c994fff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE31901878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2384544c43795184c55fe988e6b82523075b6d1794ff239b2f1d44c9d75f04fe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE31901879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0401dec1d71928290fb32450ca79017e4d9832dc0e288e909e4ad71062c0987. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWAE31901880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcac0f155c7f2b501785812a59ef65244247d284ad5e6d16cf1bc462d91c5c1e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731678365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de5a7c4d85e1ea2b89a8bfb8f41e6ac1be408310722b636d01726840819ffb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731678366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0dd307c3911397563582f15ffb1001173893458445b08d07e5ed8ba9cc4559. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731678367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3740443f0186cada04da6de6f5b1a1ff6b15187e295e47ef6fe95469855f96. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731678368.